# Audio Interchange File Format — file signature 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46 at offset 0 any

For Audio Interchange File Format, hex signature is 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46; offset is 0 any; extension is aiff aif aifc snd iff, verified against its source on 2026-09-22.

- **Hex signature:** 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46 _(verified: appears in the quote below)_
- **Offset:** 0 any _(verified: appears in the quote below)_
- **Extension:** aiff aif aifc snd iff _(verified: appears in the quote below)_
- **Format:** Audio Interchange File Format _(verified: appears in the quote below)_

## What the source says

> 46 4F 52 4D ?? ?? ?? ?? 41 49 46 46 | FORM????AIFF | 0 any | aiff aif aifc snd iff | Audio Interchange File Format |

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).